PLC I/O Modules

PLC I/O modules are one of the three core components that operate a programmable logic controller. I/O refers to input/output. PLC I/O modules act as messengers between a processor and an I/O device.

How do PLC I/O modules work?

PLC I/O modules assist the data exchange between an external device and computer memory. Their main job is to process communication to the PLC and accept commands sent from a processor. They can also detect errors, run status reports and co-ordinate a timely flow of data.

Types of PLC I/O modules

The type of PLC I/O modules used by a programmable logic controller depends on the type of input device. These are categorised as input or output types. Some PLCs respond to digital inputs and outputs, whereas others respond to analog signals. Digital inputs are either on or off, and analog signals process conditions as voltage. Other types include discrete, speciality and communication modules. Smaller PLCs are usually designed with fixed I/O points.


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Description Price Manufacturer Series Number of Inputs Number of Outputs Input Type Output Type For Use With Number of I/O Interface Voltage Category Output Current Module Type Length Width Depth
RS Stock No. 827-3760
Mfr. Part No.170ADM39030
$715.88
Each
units
170ADM 10 8 Discrete Discrete Modicon Momentum Automation Platform 10 (Input), 8 (Output) - 24 V dc 5 mA - 141.5mm 125mm 47.5mm
RS Stock No. 855-3303
Mfr. Part No.2701155
$135.96
Each
units
IB IL 24 DO 4-XC-PAC - 4 - Digital - - - - 2 A - 140.5mm 12.2mm 71.5mm
New
RS Stock No. 196-1256
Mfr. Part No.2700973
$544.09
Each
units
- 8 4 Digital Digital INTERBUS 4 (Digital Output), 8 (Digital Input) - - 500 mA - 80mm 119.8mm 71.5mm
RS Stock No. 283-6429
Mfr. Part No.2799364
$162.03
Each
units
PSM PTK-4 - - - - - - - 28 V dc, 240 V ac - - 86mm 12.3mm 96mm
RS Stock No. 770-2526
Mfr. Part No.TM5SDI6D
$124.21
Each
units
TM5 6 - Digital - Modicon LMC058, Modicon M258 - - 24 V dc - - 99mm 12.5mm 75mm
RS Stock No. 806-6963
Mfr. Part No.TM3DQ8TG
$167.04
Each
units
TM3 Series - 8 - Source, Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 500 mA - 90mm 23.6mm 70mm
RS Stock No. 855-3313
Mfr. Part No.2701160
$778.03
Each
units
IB IL CAN-MA-XC-PAC - - - - - - - - - - - - -
RS Stock No. 806-7001
Mfr. Part No.TM3DQ16UG
$299.04
Each
units
TM3 Series - 16 - Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 500 mA - 90mm 23.6mm 70mm
New
RS Stock No. 201-5501
Mfr. Part No.2701237
$780.37
Each
units
Axioline F XC 8 8 Analogue Analogue - - - 5 V dc 20 mA - - - -
RS Stock No. 467-832
Mfr. Part No.6GK5308-2FP00-2AA3
BrandSiemens
$18,503.46
Each
units
6GK5 308 - - - - - 14 - 24 V dc - - 125mm 120mm 123mm
RS Stock No. 855-3448
Mfr. Part No.2861357
$458.67
Each
units
IB IL RS 232-PAC - - - - - - - 19.2 → 30 V dc - - 136.8mm 24.4mm 71.5mm
New
RS Stock No. 201-6417
Mfr. Part No.2701813
$199.67
Each
units
AXL F - 16 dedicated Voltage Digital - - - 24 V dc 500 mA - - - -
RS Stock No. 614-0693
Mfr. Part No.6GK5101-1BC00-2AA3
BrandSiemens
$1,396.26
Each
units
6GK5 101 - - - - - - Ethernet 24 V dc - Ethernet Communications Module 125mm 40mm 124mm
RS Stock No. 662-3674
Mfr. Part No.6ES7138-4CA50-0AB0
BrandSiemens
$77.09
Each
units
SIMATIC ET 200S - - - Current, Potential, Voltage SIMATIC ET 200S Series - - 24 → 48 V dc - Power Module - - -
RS Stock No. 806-6979
Mfr. Part No.TM3DQ16TK
$252.70
Each
units
TM3 Series - 16 - Source, Transistor Modicon M221, Modicon M241, Modicon M251 - - 24 V 100 mA - 90mm 17.6mm 70mm
RS Stock No. 136-2800
Mfr. Part No.NXAD3603
BrandOmron
$387.18
Each
units
NX 4 - Analogue - CJ PLC, EtherCAT Coupler Unit, NX Series CPU Unit 4 (Input) - -10 → +10 V - Input 12mm 71mm 100mm
RS Stock No. 855-3252
Mfr. Part No.2692720
$383.03
Each
units
IB IL IFS-MA-PAC - - - - - - - - - - 135mm 24.4mm 71.5mm
RS Stock No. 575-024
Mfr. Part No.2701072
$123.67
Each
units
NLC-IO-6I-04QTP-01A 6 4 Digital Digital - - - 24 V dc - I/O Module 103.5mm 40mm 43mm
RS Stock No. 893-6799
Mfr. Part No.1339920000
BrandWeidmuller
$1.84
Each
units
- - - - - Remote I/O Module - - - - - - - -
RS Stock No. 181-1144
Mfr. Part No.PR100195
BrandKunbus
$266.21
Each
units
REVOLUTION PI 16 - Digital - Revolution Pi Connect, Revolution Pi Core 16 - - - Digital Input 96mm 22.5mm 110.5mm
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